Finding the Fourth Proportional to 2,221.11, 3,328.78 and 903.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.11 : 3,328.78 = 903.33 : x
2. Step 2: Convert to fraction form
   2,221.11/3,328.78 = 903.33/x
3. Step 3: Cross multiply
   2,221.11x = 3,328.78 × 903.33
4. Step 4: Simplify right side
   2,221.11x = 3,006,973.10
5. Step 5: Solve for x
   x = 3,006,973.10/2,221.11
6. Step 6: Final answer
   x = 1,353.82